To change the password for your Google Account:
- Go to the Google Accounts homepage.
- Enter your username and password, then click Sign in.
- Click your name or email address at the top-right of the page.
- Click Account Settings.
- Click Changing your password.
If you're unable to sign in to your Google Account, or you've forgotten your password, just enter your username on the password-assistance page to reset your password and regain access to your account.
Any changes you make to your account will affect all Google services that require you to sign in. For instance, if you change your password for Picasa Web Albums, you need to use this new password to access Gmail.